Interleaved Operation of Three-Level Neutral Point Clamped Converter Legs and Reduction of Circulating Currents under SHE-PWM

No Thumbnail Available
Identifiers
ISSN: 0278-0046
DOI: 10.1109/TIE.2016.2521729
Publication date
2016-06
Authors
Advisors
Journal Title
Journal ISSN
Volume Title
Publisher
Citations
Google Scholar
Export
Research Projects
Organizational Units
Journal Issue
Abstract
Interleaving of voltage-source converter (VSC) legs enables higher output currents per phase, effectively increasing the power rating without increasing semiconductor ratings. However, the interleaved operation results in circulating currents between each phase converter legs as well as a zero-sequence circulating current (ZSCC), which become quite prominent when the converters operate with low switching frequencies. This paper demonstrates the interleaved operation of three-level converters under selective harmonic elimination pulsewidth modulation (SHE-PWM). A controller for the circulating current within the legs of each phase is also proposed. The controller is used in combination with optimally selected SHE-PWM patterns to generate the maximum number of voltage levels and minimize the peak value of the circulating current. Simulation and experimental results show the interleaved operation and the effect of SHE-PWM pattern selection in the overall system.
Description
Publisher Copyright: © 2016 IEEE.
Keywords
Interleaving , multilevel converters , parallel legs , Multilevel waveforms , Selective harmonic elimination pulsewidth modulation (SHE-PWM) , Voltage-source converters (VSCs) , Interleaving , Multilevel converters , Multilevel waveforms , Parallel legs , Selective harmonic elimination pulsewidth modulation (SHE-PWM) , Voltage-source converters (VSCs) , Control and Systems Engineering , Electrical and Electronic Engineering
Type
journal article
Citation
Konstantinou , G , Pou , J , Capella , G J , Song , K , Ceballos , S & Agelidis , V G 2016 , ' Interleaved Operation of Three-Level Neutral Point Clamped Converter Legs and Reduction of Circulating Currents under SHE-PWM ' , IEEE Transactions on Industrial Electronics , vol. 63 , no. 6 , 7393546 , pp. 3323-3332 . https://doi.org/10.1109/TIE.2016.2521729